I don't know much about Lua either but very interested in learning. I play Lord of the Rings Online and their plugins and such are in Lua, hope to learn enough to help develop and repair existing. plugins

I don't know much about coding, but I can guarantee you that, Science "Physics" and game "physics" Are 2 completely differen't things, though both use the same concept. Where in the real world you hitting your hand on a desk, would hurt and theirs no "targeting" box around your hand for "damage received", though in a game you have a box (using 3D engines as an example) around certain parts of the character module that can be "dissembled" through the physics code. :P